It depends on the hospital - the hospital that my older 2 were born in had a limit of 2 plus a Student MW or doula for VBs. I have a Student MW this time and had one with DD2. I liked having a student so much that I would recommend it to anyone.

For #3 DH and the student MW will be in surgery with me, plus however many medical staff are needed and possibly a few student obs, considering it is a teaching hospital.